Date: Fri, 04 Oct 2019 13:37:22 -0600 From: Ian Lepore <ian@freebsd.org> To: Warner Losh <imp@bsdimp.com> Cc: FreeBSD Current <freebsd-current@freebsd.org> Subject: Re: ZFS with 32-bit, non-x86 kernel Message-ID: <b7c2b26488c0238f4e77657b5fce0d798ba13ebd.camel@freebsd.org> In-Reply-To: <CANCZdfqyof2_DmbW3G3S2q2ZsFo8_zr2YUzO0SrFo1eg-HhiJw@mail.gmail.com> References: <bdfecbf4-00c6-e104-4090-c1013bac5a7f@FreeBSD.org> <2264fde0-d386-518f-2bdb-2b86afe1faf3@blastwave.org> <CANCZdfqyof2_DmbW3G3S2q2ZsFo8_zr2YUzO0SrFo1eg-HhiJw@mail.gmail.com>
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On Fri, 2019-10-04 at 13:27 -0600, Warner Losh wrote: > On Fri, Oct 4, 2019, 1:07 PM Dennis Clarke <dclarke@blastwave.org> wrote: > > > On 10/4/19 10:05 AM, Andriy Gapon wrote: > > > > > > Does anyone use ZFS with a 32-bit kernel, that is also not i386 ? > > > If you do, could you please let me know? Along with uname -rmp output. > > > Thank you! > > > > > > > I don't know if that has even been attempted by anyone. The ZIL and ZFS > > log comonents require substantial amounts of memory and I am not aware > > of anyone with arm devices that have 8GB+ of memory. I have had FreeBSD > > current on RISC-V running fairly well with ZFS however that was a purely > > rv64imafdc architecture. > > > > In the FreeBSD 10 time frame I know people were running ZFS on arm7 boards. > Iirc, there was a long list of tweaks needed to size of the ZIL. A quick > google didn't find it. > > Otoh, I looked at ZFS for NanoBSD when it first came out. I gave up because > the 256MB boards at the time made any kind of storage traffic ran things > out of memory. > > Warner > > > I will watch this thread with curiosity. There have been several threads about using zfs on armv7 over the years. Some of them are from 2013 and indicate little sucess. Others, from 2015, indicate it works... https://lists.freebsd.org/pipermail/freebsd-arm/2015-March/010607.html https://lists.freebsd.org/pipermail/freebsd-arm/2015-March/010649.html There have also been some bug reports as recently as 2017 indicating that people are still doing this on small armv7 systems. -- Ian
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